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    CLASSIFICATION METHOD OF PARTICULATE WATER ABSORBENT RESIN
    1.
    发明公开
    CLASSIFICATION METHOD OF PARTICULATE WATER ABSORBENT RESIN 有权
    分类程序颗粒状吸水性树脂

    公开(公告)号：EP2137238A4

    公开(公告)日：2013-08-28

    申请号：EP08739372

    申请日：2008-03-24

    申请人： NIPPON CATALYTIC CHEM IND

    发明人： KONISHI KAZUMASA ,  KADONAGA KENJI ,  DAIROKU YORIMICHI ,  FUJINO SHINICHI

    IPC分类号： C08J3/12 ,  B07B9/00

    CPC分类号： B07B9/00 ,  C08J3/12 ,  C08J3/122 ,  C08J2300/00

    摘要： A particulate water absorbent resin is obtained by polymerizing an unsaturated monomer so as to form a cross-linked polymer hydrogel and drying and pulverizing the cross-linked polymer hydrogel, and plural classification steps different from each other are carried out so as to remove fine powder. In this manner, the present invention provides the method for classification of particulate water absorbent resin which method allows particulate water absorbent resin having a desired particle diameter range to be efficiently obtained at low cost while securing the high productivity even in case where a larger production equipment is used.

    PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN
    3.
    发明公开
    PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN 有权
    制备吸水树脂的方法

    公开(公告)号：EP2471848A4

    公开(公告)日：2013-10-30

    申请号：EP10812059

    申请日：2010-08-30

    申请人： NIPPON CATALYTIC CHEM IND

    发明人： MATSUMOTO KOJI ,  NOGI KOZO ,  FUJINO SHINICHI ,  DAIROKU YORIMICHI ,  ISHIZAKI KUNIHIKO

    IPC分类号： C08J3/24 ,  A61L15/00 ,  C08J3/12

    CPC分类号： C08J3/12 ,  C08J3/245 ,  C08J2300/14 ,  C08J2333/02

    摘要： [PROBLEM] It is an object of the present invention to efficiently obtain efficiently a water-absorbent resin having excellent property. [SOLUTION] A production method for a water-absorbent resin, comprising: a polymerization step for obtaining hydrogel by subjecting a monomer aqueous solution to a polymerization reaction; and a drying step for drying the hydrogel; wherein drying in the drying step is performed using a continuous through-flow belt-type drying machine; solid content of the hydrogel supplied to the drying step is 35% by weight or more, and thickness variation rate (1) represented by the following EXPRESSION 1 of the hydrogel loaded onto through-flow belt in the continuous through-flow belt, is 1.05 to 5: EXPRESSION 1 Thickness variation rate 1 = Maximum thickness of hydrogel in a width direction of the through - flow belt / Average thickness of hydrogel in a width direction of the through - flow belt .

    PROCESS FOR PRODUCING PARTICULATE WATER-ABSORBING RESIN
    6.
    发明公开
    PROCESS FOR PRODUCING PARTICULATE WATER-ABSORBING RESIN 审中-公开
    HERSTELLUNGSVERFAHRENFÜRWASSERABSORBIERENDE HARZPARTIKEL

    公开(公告)号：EP2415822A4

    公开(公告)日：2017-06-07

    申请号：EP10758829

    申请日：2010-03-31

    申请人： NIPPON CATALYTIC CHEM IND

    发明人： DAIROKU YORIMICHI ,  TAKAAI TOSHIHIRO ,  FUJINO SHINICHI ,  MATSUMOTO SATOSHI

    IPC分类号： C08J3/12 ,  B01J20/26 ,  C08F20/06 ,  C08F220/06 ,  C08J3/24

    CPC分类号： C08J3/12 ,  B01J20/267 ,  B01J2220/68 ,  C08F20/06 ,  C08F220/06 ,  C08J3/245 ,  C08J2333/02

    摘要： A production of a water-absorbent resin by which a particle diameter of the water-absorbent resin can be controlled simply and conveniently, and a content of fine powder can be decreased, without necessity of change of raw materials or expensive facility investment is to be provided. The method is a continuous production method of a polyacrylic acid (salt)-based water-absorbent resin, comprising a polymerization step of an aqueous solution containing acrylic acid (salt), a drying step of the resultant hydrogel-like polymer, a pulverization step of the dried substance, a classification step of the pulverized substance, and optionally a surface cross-linking step of the classified substance, wherein (a) the drying step and the pulverization step are connected via a storage step and a transportation step; and (b) a time of holding the dried substance from a time of completing the drying step to a time of starting the pulverization step is set at 3 minutes or longer.

    摘要翻译： 一种吸水性树脂的生产可以简单方便地控制吸水性树脂的粒径，并且可以减少细粉的含量，而不必改变原料或昂贵的设备投资 提供。 该方法是聚丙烯酸（盐）类吸水性树脂的连续生产方法，其包括含有丙烯酸（盐）的水溶液的聚合步骤，所得水凝胶状聚合物的干燥步骤，粉碎步骤 （a）干燥步骤和粉碎步骤通过储存步骤和输送步骤连接;干燥步骤和粉碎步骤通过储存步骤和输送步骤连接;干燥步骤和粉碎步骤通过储存步骤和输送步骤连接; 和（b）从完成干燥步骤到开始粉碎步骤时保持干燥物质的时间设定为3分钟或更长。